West of Arroyo San Hilario (Eocene of Mexico)

Also known as MHN-UABCS Te5

Where: Baja California Sur, Mexico (24.3° N, 111.0° W: paleocoordinates 24.9° N, 97.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Tepetate Formation, Lutetian (47.8 - 41.3 Ma)

• "early Middle Eocene"

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, yellow, calcareous siltstone

• there was "at least a temporal influence of wave action and bottom currents. The thin intercalations of siltstone and sandstone [within mudstone] ... are tempestites deposite by westward-directed bottom currents during storms" in an "open-sea, [shallow] shelf environment"
• "yellow, friable [calcareous] siltstone"

Size class: macrofossils

Collection methods: collection in the Museo de Historia Natural, Universidad Autónoma de Baja California Sur

Primary reference: G. González-Barba, T. Schwennicke, J. L. Goedert and L. G. Barnes. 2002. Earliest Pacific Basin record of the Pelagornithidae (Aves: Pelecaniformes). Journal of Vertebrate Paleontology 22(3):722-725 [J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 87017: authorized by John Alroy, entered by John Alroy on 28.02.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Odontopterygiformes - Pelagornithidae
"? Odontopteryx sp." = Dasornis
"? Odontopteryx sp." = Dasornis Owen 1870 bird